1 /* 2 * Copyright (c) 2000-2005 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 #include "xfs.h" 19 #include "xfs_fs.h" 20 #include "xfs_types.h" 21 #include "xfs_bit.h" 22 #include "xfs_inum.h" 23 #include "xfs_log.h" 24 #include "xfs_trans.h" 25 #include "xfs_sb.h" 26 #include "xfs_ag.h" 27 #include "xfs_dir2.h" 28 #include "xfs_dmapi.h" 29 #include "xfs_mount.h" 30 #include "xfs_bmap_btree.h" 31 #include "xfs_alloc_btree.h" 32 #include "xfs_ialloc_btree.h" 33 #include "xfs_dir2_sf.h" 34 #include "xfs_attr_sf.h" 35 #include "xfs_dinode.h" 36 #include "xfs_inode.h" 37 #include "xfs_inode_item.h" 38 #include "xfs_btree.h" 39 #include "xfs_error.h" 40 #include "xfs_alloc.h" 41 #include "xfs_ialloc.h" 42 #include "xfs_fsops.h" 43 #include "xfs_itable.h" 44 #include "xfs_trans_space.h" 45 #include "xfs_rtalloc.h" 46 #include "xfs_rw.h" 47 48 /* 49 * File system operations 50 */ 51 52 int 53 xfs_fs_geometry( 54 xfs_mount_t *mp, 55 xfs_fsop_geom_t *geo, 56 int new_version) 57 { 58 geo->blocksize = mp->m_sb.sb_blocksize; 59 geo->rtextsize = mp->m_sb.sb_rextsize; 60 geo->agblocks = mp->m_sb.sb_agblocks; 61 geo->agcount = mp->m_sb.sb_agcount; 62 geo->logblocks = mp->m_sb.sb_logblocks; 63 geo->sectsize = mp->m_sb.sb_sectsize; 64 geo->inodesize = mp->m_sb.sb_inodesize; 65 geo->imaxpct = mp->m_sb.sb_imax_pct; 66 geo->datablocks = mp->m_sb.sb_dblocks; 67 geo->rtblocks = mp->m_sb.sb_rblocks; 68 geo->rtextents = mp->m_sb.sb_rextents; 69 geo->logstart = mp->m_sb.sb_logstart; 70 ASSERT(sizeof(geo->uuid)==sizeof(mp->m_sb.sb_uuid)); 71 memcpy(geo->uuid, &mp->m_sb.sb_uuid, sizeof(mp->m_sb.sb_uuid)); 72 if (new_version >= 2) { 73 geo->sunit = mp->m_sb.sb_unit; 74 geo->swidth = mp->m_sb.sb_width; 75 } 76 if (new_version >= 3) { 77 geo->version = XFS_FSOP_GEOM_VERSION; 78 geo->flags = 79 (XFS_SB_VERSION_HASATTR(&mp->m_sb) ? 80 XFS_FSOP_GEOM_FLAGS_ATTR : 0) | 81 (XFS_SB_VERSION_HASNLINK(&mp->m_sb) ? 82 XFS_FSOP_GEOM_FLAGS_NLINK : 0) | 83 (XFS_SB_VERSION_HASQUOTA(&mp->m_sb) ? 84 XFS_FSOP_GEOM_FLAGS_QUOTA : 0) | 85 (XFS_SB_VERSION_HASALIGN(&mp->m_sb) ? 86 XFS_FSOP_GEOM_FLAGS_IALIGN : 0) | 87 (XFS_SB_VERSION_HASDALIGN(&mp->m_sb) ? 88 XFS_FSOP_GEOM_FLAGS_DALIGN : 0) | 89 (XFS_SB_VERSION_HASSHARED(&mp->m_sb) ? 90 XFS_FSOP_GEOM_FLAGS_SHARED : 0) | 91 (XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb) ? 92 XFS_FSOP_GEOM_FLAGS_EXTFLG : 0) | 93 (XFS_SB_VERSION_HASDIRV2(&mp->m_sb) ? 94 XFS_FSOP_GEOM_FLAGS_DIRV2 : 0) | 95 (XFS_SB_VERSION_HASSECTOR(&mp->m_sb) ? 96 XFS_FSOP_GEOM_FLAGS_SECTOR : 0) | 97 (XFS_SB_VERSION_HASATTR2(&mp->m_sb) ? 98 XFS_FSOP_GEOM_FLAGS_ATTR2 : 0); 99 geo->logsectsize = XFS_SB_VERSION_HASSECTOR(&mp->m_sb) ? 100 mp->m_sb.sb_logsectsize : BBSIZE; 101 geo->rtsectsize = mp->m_sb.sb_blocksize; 102 geo->dirblocksize = mp->m_dirblksize; 103 } 104 if (new_version >= 4) { 105 geo->flags |= 106 (XFS_SB_VERSION_HASLOGV2(&mp->m_sb) ? 107 XFS_FSOP_GEOM_FLAGS_LOGV2 : 0); 108 geo->logsunit = mp->m_sb.sb_logsunit; 109 } 110 return 0; 111 } 112 113 static int 114 xfs_growfs_data_private( 115 xfs_mount_t *mp, /* mount point for filesystem */ 116 xfs_growfs_data_t *in) /* growfs data input struct */ 117 { 118 xfs_agf_t *agf; 119 xfs_agi_t *agi; 120 xfs_agnumber_t agno; 121 xfs_extlen_t agsize; 122 xfs_extlen_t tmpsize; 123 xfs_alloc_rec_t *arec; 124 xfs_btree_sblock_t *block; 125 xfs_buf_t *bp; 126 int bucket; 127 int dpct; 128 int error; 129 xfs_agnumber_t nagcount; 130 xfs_agnumber_t nagimax = 0; 131 xfs_rfsblock_t nb, nb_mod; 132 xfs_rfsblock_t new; 133 xfs_rfsblock_t nfree; 134 xfs_agnumber_t oagcount; 135 int pct; 136 xfs_sb_t *sbp; 137 xfs_trans_t *tp; 138 139 nb = in->newblocks; 140 pct = in->imaxpct; 141 if (nb < mp->m_sb.sb_dblocks || pct < 0 || pct > 100) 142 return XFS_ERROR(EINVAL); 143 dpct = pct - mp->m_sb.sb_imax_pct; 144 error = xfs_read_buf(mp, mp->m_ddev_targp, 145 XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1), 146 XFS_FSS_TO_BB(mp, 1), 0, &bp); 147 if (error) 148 return error; 149 ASSERT(bp); 150 xfs_buf_relse(bp); 151 152 new = nb; /* use new as a temporary here */ 153 nb_mod = do_div(new, mp->m_sb.sb_agblocks); 154 nagcount = new + (nb_mod != 0); 155 if (nb_mod && nb_mod < XFS_MIN_AG_BLOCKS) { 156 nagcount--; 157 nb = nagcount * mp->m_sb.sb_agblocks; 158 if (nb < mp->m_sb.sb_dblocks) 159 return XFS_ERROR(EINVAL); 160 } 161 new = nb - mp->m_sb.sb_dblocks; 162 oagcount = mp->m_sb.sb_agcount; 163 if (nagcount > oagcount) { 164 down_write(&mp->m_peraglock); 165 mp->m_perag = kmem_realloc(mp->m_perag, 166 sizeof(xfs_perag_t) * nagcount, 167 sizeof(xfs_perag_t) * oagcount, 168 KM_SLEEP); 169 memset(&mp->m_perag[oagcount], 0, 170 (nagcount - oagcount) * sizeof(xfs_perag_t)); 171 mp->m_flags |= XFS_MOUNT_32BITINODES; 172 nagimax = xfs_initialize_perag(XFS_MTOVFS(mp), mp, nagcount); 173 up_write(&mp->m_peraglock); 174 } 175 tp = xfs_trans_alloc(mp, XFS_TRANS_GROWFS); 176 if ((error = xfs_trans_reserve(tp, XFS_GROWFS_SPACE_RES(mp), 177 XFS_GROWDATA_LOG_RES(mp), 0, 0, 0))) { 178 xfs_trans_cancel(tp, 0); 179 return error; 180 } 181 182 nfree = 0; 183 for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) { 184 /* 185 * AG freelist header block 186 */ 187 bp = xfs_buf_get(mp->m_ddev_targp, 188 XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)), 189 XFS_FSS_TO_BB(mp, 1), 0); 190 agf = XFS_BUF_TO_AGF(bp); 191 memset(agf, 0, mp->m_sb.sb_sectsize); 192 agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC); 193 agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION); 194 agf->agf_seqno = cpu_to_be32(agno); 195 if (agno == nagcount - 1) 196 agsize = 197 nb - 198 (agno * (xfs_rfsblock_t)mp->m_sb.sb_agblocks); 199 else 200 agsize = mp->m_sb.sb_agblocks; 201 agf->agf_length = cpu_to_be32(agsize); 202 agf->agf_roots[XFS_BTNUM_BNOi] = cpu_to_be32(XFS_BNO_BLOCK(mp)); 203 agf->agf_roots[XFS_BTNUM_CNTi] = cpu_to_be32(XFS_CNT_BLOCK(mp)); 204 agf->agf_levels[XFS_BTNUM_BNOi] = cpu_to_be32(1); 205 agf->agf_levels[XFS_BTNUM_CNTi] = cpu_to_be32(1); 206 agf->agf_flfirst = 0; 207 agf->agf_fllast = cpu_to_be32(XFS_AGFL_SIZE(mp) - 1); 208 agf->agf_flcount = 0; 209 tmpsize = agsize - XFS_PREALLOC_BLOCKS(mp); 210 agf->agf_freeblks = cpu_to_be32(tmpsize); 211 agf->agf_longest = cpu_to_be32(tmpsize); 212 error = xfs_bwrite(mp, bp); 213 if (error) { 214 goto error0; 215 } 216 /* 217 * AG inode header block 218 */ 219 bp = xfs_buf_get(mp->m_ddev_targp, 220 XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)), 221 XFS_FSS_TO_BB(mp, 1), 0); 222 agi = XFS_BUF_TO_AGI(bp); 223 memset(agi, 0, mp->m_sb.sb_sectsize); 224 agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC); 225 agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION); 226 agi->agi_seqno = cpu_to_be32(agno); 227 agi->agi_length = cpu_to_be32(agsize); 228 agi->agi_count = 0; 229 agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp)); 230 agi->agi_level = cpu_to_be32(1); 231 agi->agi_freecount = 0; 232 agi->agi_newino = cpu_to_be32(NULLAGINO); 233 agi->agi_dirino = cpu_to_be32(NULLAGINO); 234 for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++) 235 agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO); 236 error = xfs_bwrite(mp, bp); 237 if (error) { 238 goto error0; 239 } 240 /* 241 * BNO btree root block 242 */ 243 bp = xfs_buf_get(mp->m_ddev_targp, 244 XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)), 245 BTOBB(mp->m_sb.sb_blocksize), 0); 246 block = XFS_BUF_TO_SBLOCK(bp); 247 memset(block, 0, mp->m_sb.sb_blocksize); 248 block->bb_magic = cpu_to_be32(XFS_ABTB_MAGIC); 249 block->bb_level = 0; 250 block->bb_numrecs = cpu_to_be16(1); 251 block->bb_leftsib = cpu_to_be32(NULLAGBLOCK); 252 block->bb_rightsib = cpu_to_be32(NULLAGBLOCK); 253 arec = XFS_BTREE_REC_ADDR(xfs_alloc, block, 1); 254 arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp)); 255 arec->ar_blockcount = cpu_to_be32( 256 agsize - be32_to_cpu(arec->ar_startblock)); 257 error = xfs_bwrite(mp, bp); 258 if (error) { 259 goto error0; 260 } 261 /* 262 * CNT btree root block 263 */ 264 bp = xfs_buf_get(mp->m_ddev_targp, 265 XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)), 266 BTOBB(mp->m_sb.sb_blocksize), 0); 267 block = XFS_BUF_TO_SBLOCK(bp); 268 memset(block, 0, mp->m_sb.sb_blocksize); 269 block->bb_magic = cpu_to_be32(XFS_ABTC_MAGIC); 270 block->bb_level = 0; 271 block->bb_numrecs = cpu_to_be16(1); 272 block->bb_leftsib = cpu_to_be32(NULLAGBLOCK); 273 block->bb_rightsib = cpu_to_be32(NULLAGBLOCK); 274 arec = XFS_BTREE_REC_ADDR(xfs_alloc, block, 1); 275 arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp)); 276 arec->ar_blockcount = cpu_to_be32( 277 agsize - be32_to_cpu(arec->ar_startblock)); 278 nfree += be32_to_cpu(arec->ar_blockcount); 279 error = xfs_bwrite(mp, bp); 280 if (error) { 281 goto error0; 282 } 283 /* 284 * INO btree root block 285 */ 286 bp = xfs_buf_get(mp->m_ddev_targp, 287 XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)), 288 BTOBB(mp->m_sb.sb_blocksize), 0); 289 block = XFS_BUF_TO_SBLOCK(bp); 290 memset(block, 0, mp->m_sb.sb_blocksize); 291 block->bb_magic = cpu_to_be32(XFS_IBT_MAGIC); 292 block->bb_level = 0; 293 block->bb_numrecs = 0; 294 block->bb_leftsib = cpu_to_be32(NULLAGBLOCK); 295 block->bb_rightsib = cpu_to_be32(NULLAGBLOCK); 296 error = xfs_bwrite(mp, bp); 297 if (error) { 298 goto error0; 299 } 300 } 301 xfs_trans_agblocks_delta(tp, nfree); 302 /* 303 * There are new blocks in the old last a.g. 304 */ 305 if (new) { 306 /* 307 * Change the agi length. 308 */ 309 error = xfs_ialloc_read_agi(mp, tp, agno, &bp); 310 if (error) { 311 goto error0; 312 } 313 ASSERT(bp); 314 agi = XFS_BUF_TO_AGI(bp); 315 be32_add(&agi->agi_length, new); 316 ASSERT(nagcount == oagcount || 317 be32_to_cpu(agi->agi_length) == mp->m_sb.sb_agblocks); 318 xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH); 319 /* 320 * Change agf length. 321 */ 322 error = xfs_alloc_read_agf(mp, tp, agno, 0, &bp); 323 if (error) { 324 goto error0; 325 } 326 ASSERT(bp); 327 agf = XFS_BUF_TO_AGF(bp); 328 be32_add(&agf->agf_length, new); 329 ASSERT(be32_to_cpu(agf->agf_length) == 330 be32_to_cpu(agi->agi_length)); 331 /* 332 * Free the new space. 333 */ 334 error = xfs_free_extent(tp, XFS_AGB_TO_FSB(mp, agno, 335 be32_to_cpu(agf->agf_length) - new), new); 336 if (error) { 337 goto error0; 338 } 339 } 340 if (nagcount > oagcount) 341 xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount); 342 if (nb > mp->m_sb.sb_dblocks) 343 xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS, 344 nb - mp->m_sb.sb_dblocks); 345 if (nfree) 346 xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree); 347 if (dpct) 348 xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct); 349 error = xfs_trans_commit(tp, 0); 350 if (error) { 351 return error; 352 } 353 /* New allocation groups fully initialized, so update mount struct */ 354 if (nagimax) 355 mp->m_maxagi = nagimax; 356 if (mp->m_sb.sb_imax_pct) { 357 __uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct; 358 do_div(icount, 100); 359 mp->m_maxicount = icount << mp->m_sb.sb_inopblog; 360 } else 361 mp->m_maxicount = 0; 362 for (agno = 1; agno < nagcount; agno++) { 363 error = xfs_read_buf(mp, mp->m_ddev_targp, 364 XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)), 365 XFS_FSS_TO_BB(mp, 1), 0, &bp); 366 if (error) { 367 xfs_fs_cmn_err(CE_WARN, mp, 368 "error %d reading secondary superblock for ag %d", 369 error, agno); 370 break; 371 } 372 sbp = XFS_BUF_TO_SBP(bp); 373 xfs_xlatesb(sbp, &mp->m_sb, -1, XFS_SB_ALL_BITS); 374 /* 375 * If we get an error writing out the alternate superblocks, 376 * just issue a warning and continue. The real work is 377 * already done and committed. 378 */ 379 if (!(error = xfs_bwrite(mp, bp))) { 380 continue; 381 } else { 382 xfs_fs_cmn_err(CE_WARN, mp, 383 "write error %d updating secondary superblock for ag %d", 384 error, agno); 385 break; /* no point in continuing */ 386 } 387 } 388 return 0; 389 390 error0: 391 xfs_trans_cancel(tp, XFS_TRANS_ABORT); 392 return error; 393 } 394 395 static int 396 xfs_growfs_log_private( 397 xfs_mount_t *mp, /* mount point for filesystem */ 398 xfs_growfs_log_t *in) /* growfs log input struct */ 399 { 400 xfs_extlen_t nb; 401 402 nb = in->newblocks; 403 if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES)) 404 return XFS_ERROR(EINVAL); 405 if (nb == mp->m_sb.sb_logblocks && 406 in->isint == (mp->m_sb.sb_logstart != 0)) 407 return XFS_ERROR(EINVAL); 408 /* 409 * Moving the log is hard, need new interfaces to sync 410 * the log first, hold off all activity while moving it. 411 * Can have shorter or longer log in the same space, 412 * or transform internal to external log or vice versa. 413 */ 414 return XFS_ERROR(ENOSYS); 415 } 416 417 /* 418 * protected versions of growfs function acquire and release locks on the mount 419 * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG, 420 * XFS_IOC_FSGROWFSRT 421 */ 422 423 424 int 425 xfs_growfs_data( 426 xfs_mount_t *mp, 427 xfs_growfs_data_t *in) 428 { 429 int error; 430 if (!cpsema(&mp->m_growlock)) 431 return XFS_ERROR(EWOULDBLOCK); 432 error = xfs_growfs_data_private(mp, in); 433 vsema(&mp->m_growlock); 434 return error; 435 } 436 437 int 438 xfs_growfs_log( 439 xfs_mount_t *mp, 440 xfs_growfs_log_t *in) 441 { 442 int error; 443 if (!cpsema(&mp->m_growlock)) 444 return XFS_ERROR(EWOULDBLOCK); 445 error = xfs_growfs_log_private(mp, in); 446 vsema(&mp->m_growlock); 447 return error; 448 } 449 450 /* 451 * exported through ioctl XFS_IOC_FSCOUNTS 452 */ 453 454 int 455 xfs_fs_counts( 456 xfs_mount_t *mp, 457 xfs_fsop_counts_t *cnt) 458 { 459 unsigned long s; 460 461 xfs_icsb_sync_counters_flags(mp, XFS_ICSB_LAZY_COUNT); 462 s = XFS_SB_LOCK(mp); 463 cnt->freedata = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); 464 cnt->freertx = mp->m_sb.sb_frextents; 465 cnt->freeino = mp->m_sb.sb_ifree; 466 cnt->allocino = mp->m_sb.sb_icount; 467 XFS_SB_UNLOCK(mp, s); 468 return 0; 469 } 470 471 /* 472 * exported through ioctl XFS_IOC_SET_RESBLKS & XFS_IOC_GET_RESBLKS 473 * 474 * xfs_reserve_blocks is called to set m_resblks 475 * in the in-core mount table. The number of unused reserved blocks 476 * is kept in m_resblks_avail. 477 * 478 * Reserve the requested number of blocks if available. Otherwise return 479 * as many as possible to satisfy the request. The actual number 480 * reserved are returned in outval 481 * 482 * A null inval pointer indicates that only the current reserved blocks 483 * available should be returned no settings are changed. 484 */ 485 486 int 487 xfs_reserve_blocks( 488 xfs_mount_t *mp, 489 __uint64_t *inval, 490 xfs_fsop_resblks_t *outval) 491 { 492 __int64_t lcounter, delta, fdblks_delta; 493 __uint64_t request; 494 unsigned long s; 495 496 /* If inval is null, report current values and return */ 497 498 if (inval == (__uint64_t *)NULL) { 499 outval->resblks = mp->m_resblks; 500 outval->resblks_avail = mp->m_resblks_avail; 501 return 0; 502 } 503 504 request = *inval; 505 506 /* 507 * With per-cpu counters, this becomes an interesting 508 * problem. we needto work out if we are freeing or allocation 509 * blocks first, then we can do the modification as necessary. 510 * 511 * We do this under the XFS_SB_LOCK so that if we are near 512 * ENOSPC, we will hold out any changes while we work out 513 * what to do. This means that the amount of free space can 514 * change while we do this, so we need to retry if we end up 515 * trying to reserve more space than is available. 516 * 517 * We also use the xfs_mod_incore_sb() interface so that we 518 * don't have to care about whether per cpu counter are 519 * enabled, disabled or even compiled in.... 520 */ 521 retry: 522 s = XFS_SB_LOCK(mp); 523 xfs_icsb_sync_counters_flags(mp, XFS_ICSB_SB_LOCKED); 524 525 /* 526 * If our previous reservation was larger than the current value, 527 * then move any unused blocks back to the free pool. 528 */ 529 fdblks_delta = 0; 530 if (mp->m_resblks > request) { 531 lcounter = mp->m_resblks_avail - request; 532 if (lcounter > 0) { /* release unused blocks */ 533 fdblks_delta = lcounter; 534 mp->m_resblks_avail -= lcounter; 535 } 536 mp->m_resblks = request; 537 } else { 538 __int64_t free; 539 540 free = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); 541 if (!free) 542 goto out; /* ENOSPC and fdblks_delta = 0 */ 543 544 delta = request - mp->m_resblks; 545 lcounter = free - delta; 546 if (lcounter < 0) { 547 /* We can't satisfy the request, just get what we can */ 548 mp->m_resblks += free; 549 mp->m_resblks_avail += free; 550 fdblks_delta = -free; 551 mp->m_sb.sb_fdblocks = XFS_ALLOC_SET_ASIDE(mp); 552 } else { 553 fdblks_delta = -delta; 554 mp->m_sb.sb_fdblocks = 555 lcounter + XFS_ALLOC_SET_ASIDE(mp); 556 mp->m_resblks = request; 557 mp->m_resblks_avail += delta; 558 } 559 } 560 out: 561 outval->resblks = mp->m_resblks; 562 outval->resblks_avail = mp->m_resblks_avail; 563 XFS_SB_UNLOCK(mp, s); 564 565 if (fdblks_delta) { 566 /* 567 * If we are putting blocks back here, m_resblks_avail is 568 * already at it's max so this will put it in the free pool. 569 * 570 * If we need space, we'll either succeed in getting it 571 * from the free block count or we'll get an enospc. If 572 * we get a ENOSPC, it means things changed while we were 573 * calculating fdblks_delta and so we should try again to 574 * see if there is anything left to reserve. 575 * 576 * Don't set the reserved flag here - we don't want to reserve 577 * the extra reserve blocks from the reserve..... 578 */ 579 int error; 580 error = xfs_mod_incore_sb(mp, XFS_SBS_FDBLOCKS, fdblks_delta, 0); 581 if (error == ENOSPC) 582 goto retry; 583 } 584 585 return 0; 586 } 587 588 void 589 xfs_fs_log_dummy( 590 xfs_mount_t *mp) 591 { 592 xfs_trans_t *tp; 593 xfs_inode_t *ip; 594 595 tp = _xfs_trans_alloc(mp, XFS_TRANS_DUMMY1); 596 if (xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0)) { 597 xfs_trans_cancel(tp, 0); 598 return; 599 } 600 601 ip = mp->m_rootip; 602 xfs_ilock(ip, XFS_ILOCK_EXCL); 603 604 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 605 xfs_trans_ihold(tp, ip); 606 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 607 xfs_trans_set_sync(tp); 608 xfs_trans_commit(tp, 0); 609 610 xfs_iunlock(ip, XFS_ILOCK_EXCL); 611 } 612 613 int 614 xfs_fs_goingdown( 615 xfs_mount_t *mp, 616 __uint32_t inflags) 617 { 618 switch (inflags) { 619 case XFS_FSOP_GOING_FLAGS_DEFAULT: { 620 struct bhv_vfs *vfsp = XFS_MTOVFS(mp); 621 struct super_block *sb = freeze_bdev(vfsp->vfs_super->s_bdev); 622 623 if (sb && !IS_ERR(sb)) { 624 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT); 625 thaw_bdev(sb->s_bdev, sb); 626 } 627 628 break; 629 } 630 case XFS_FSOP_GOING_FLAGS_LOGFLUSH: 631 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT); 632 break; 633 case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH: 634 xfs_force_shutdown(mp, 635 SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR); 636 break; 637 default: 638 return XFS_ERROR(EINVAL); 639 } 640 641 return 0; 642 } 643